Quick and dirty MidCOM caching with Cache_Lite
If you want to cache your MidCOM site, but are on a chrooted environment and so can’t run Squid, one option is to use the Cache_Lite PEAR package. To do this, you must have access to the page elements used on your site.
Place something like the following to the <(code-init-before-midcom)> element:
<?php
// QuickNDirty output caching
$GLOBALS['cache_enable'] = true;
if ( array_key_exists('PHPSESSID', $_COOKIE)
|| $_MIDGARD['user']
|| count($_POST) > 0)
{
// Don't cache requests where a POST is made or where we have an authenticated used
$GLOBALS['cache_enable'] = false;
}
if (in_array('api', $_MIDGARD['argv']))
{
// Don't cache net.nehmer.blog remote API calls
$GLOBALS['cache_enable'] = false;
}
if ( $_MIDGARD['argc'] > 0
&& substr($_MIDGARD['argv'][0], 0, 7) == 'midcom-')
{
// Don't cache the midcom-some-action URLs
$GLOBALS['cache_enable'] = false;
}
if ($GLOBALS['cache_enable'])
{
// Include the package
require_once('Cache/Lite.php');
// Set a few options
$options = array
(
'cacheDir' => '/var/cache/midgard/www.example.net/',
'lifeTime' => 1800
);
// Generate the unique cache ID
$cache_id = md5($_MIDGARD['uri'] . ':' . serialize($_GET));
// Create a Cache_Lite object
$GLOBALS['cache'] = new Cache_Lite($options);
// Test if thereis a valide cache for this id
if ($data = $GLOBALS['cache']->get($cache_id))
{
echo $data;
exit();
}
ob_start();
}
?>
And edit the <(code-finish)> element to contain the following:
<?php
$_MIDCOM->finish();
if ($GLOBALS['cache_enable'])
{
$data = ob_get_contents();
$GLOBALS['cache']->save($data);
ob_end_flush();
}
?>
Cache_Lite can be used for caching all regular content pages, but not attachments due to the way attachment serving is implemented in MidCOM.